I have a TypeScript generic for an object with an unspecified number of string parameters like this:
type Params<T extends string[]> = Record<T[number], string>;
However, every time I want to use it, I need to define it with an array like so:
const params: Params<['param1', 'param2', ...]> = { param1: etc...
Is there a way to declare this generic without specifying an array, so I can use it like this instead:
const params: Params<'param1', 'param2', ...> = { param1: etc...
After seeing a great solution in the previous discussions, I came up with another creative approach:
interface SplitString<T extends string> =
T extends `${infer A}, ${infer B}`
? A | SplitString<B>
: T
type Parameters<T extends string> = Record<SplitString<T>, string>;
const parameters1: Parameters<'param1, param2'> = { param1: '123' }
// This will throw an error since param2 is missing
const parameters2: Parameters<'param1, param2'> = { param1: '123', param2: '678' }
// This one is good to go
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